Switch to side-by-side view

--- a/Allura/allura/controllers/attachments.py
+++ b/Allura/allura/controllers/attachments.py
@@ -65,7 +65,7 @@
                     pass
             redirect(request.referer)
         embed=False
-        if self.attachment.content_type and 'image/' in self.attachment.content_type:
+        if self.attachment.content_type and self.attachment.content_type.startswith('image/'):
             embed = True
         return self.attachment.serve(embed=embed)